2012 BFY Abstract Detail Page

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Abstract Title: W32 - Diffusion in Microfluidic Structures
Abstract: This is a hands-on workshop in which participants perform one of the eight experiments developed to accompany a junior level biophysics course at the Johns Hopkins University. The year-long course can also be used as an alternative sequence to the sophomore level waves and statistical mechanics courses. The experiments are short and designed to be performed in place of one or at most two discussion sections; this particular experiment has participants using a "lab on a chip" to measure molecular diffusion in water, from which a value for Boltzmann's constant can be found. The concepts of Reynolds number and laminar flow, diffusion, viscous drag, and Einstein's relation underlie this experiment. Video capture with a microscope, analysis of the image data, least-squares fitting, and using microfludic structures to manipulate molecules are some of the techniques utilized. The experiment can be assembled from commercially available apparatus and parts.
Abstract Type: Workshop

Workshop Documents

Workshop Document: Download the Workshop Document

Author/Organizer Information

Primary Contact: Steve Wonnell
Johns Hopkins University